Self-shank button drilling machine



arch 16, 19435.

Filed M arch 1940 7 Sheets-Sheet 1 fi z I mm I 0 NR ANN mm n Y r w H- on M 0 o M Mr 0 O QM WM R o H r R 1 H wk 1 MN o o o 0 o 0 o 0 .MW

O 0/ e u w w wk INVENTORS O J. WEBER JR. L. H. WEBER, I

F. b. WEBER LG. WEBER, CE WEBER W. E WEBER, E. M. WEBER 61 4. 60E 7'ZM/l/V A TTORNEY March 16, 1943- J. WEBER, JR., "arm. 2,313,981,

1 SELF-SHANK BUTTON DRILLING MACHINE "Filed March 21, 1940 7Sheets-Sheet 2 INVENTORS' J. WEBER Jl? L H. WEBER, Eh. WEEEE LQWEBER,

c. E WEBER n. E WEBER, E. m WEBER, QA'60E7'ZMA/V ATTORNEY :Marl; 16,1943. J. WEBER, JR., EI'AL 2,313,981

SELF-SHANK BUTTON DRILLINGMACHINE Filed March 21, 1940 7 Sheets-Sheet 4INVENTORY J. WEBER JR. L. H. WEBER, F. H. WEBER L6. WEBER, C.FI WEBERW.E WEBER, EJ'M WEBER C.A.GOETZMA/V ATTORNEY March 16, 1943. J, WEBER,JR, ETAL 2,313,981

' SELF-SHANK BUTTON DRILLING MACHINE Filed March 21, 1940 7Sheets-Sheet, 5

Ezg- 6 WWVTORS J. WEBER JR. L. H. WEBER, Him 55E? La. WEBER, C.F. WEBERWE WEBER, 5. m WEBER ,CA. GOETZMA/V ATTORNEY March 16, 1943. J. WEBER,JR., ET Al. 2,313,931

'SELF-SHANK BUTTON DRILLING MACHINE Filed March 21, 1940 7 Sheets-Sheet6 INVENTORS J WEBER JR.,L. H. WEEE/f',

.WEEER L.6.WEBER, .WEBER WJ-T WEBER. E. m WEBER, CAGOETZMA/V ATTORNEYPatented Mar. 16, 1943 umreo sir-Ar es;

enranr @FFHQE BUTTON DRILLING MACHINE aonmis. (01. 79-11) The presentinventionrelates 12912 391 art of drillm blanks in the manufacture'o-flselfl-s'jhank' ut-j tons. In pa ticular, in accordance withjt Jvention, there is provided a' caning machine hic'h we have found to beparticul y: suited '(Q'BHQ 5 h h peed drilling of u s lso. ther i o d da new P2 5,. of drilli g self-sh nk buttons, to which process thepresent machine is By this invention it has been fonnd possible toprodfuc e this type ofbl fiz ns iil'thiscountry, Prior to this inventionandthat discldsed our co;- ie i l e p isa o l i N 3 23.5 fiL dQ Q- mcr 1. 9 q d rect d l das g iorl ri l ng sel sha k but bn v rtua lyfa lOf h i untryh'aye'been ale and are.

and. n e b tton ma na. many ve -ewe a elin'awa i having been made whichi drilling such bhttonscornineiiially.

"In designing button dr'illing' machinery, we have 25 found unlocked fordifficulties 'hav nundthat the; 'rnachine'- operates muchmorgsatisfactorily when both the arm chuck and the button chu re a riedbye-sin e odi' mem erapparently reduces relative mo rnent between 39the. w r m thatw fi ther ar ri srnchroi l us y mov n ody members:Further, wehave found that it is of advantage in the operation of themachine particularly in imp'r oving the accuracy of ill g, to'have thebutton chuck jaws non-move. e along the axis of the button chuck in suchdrilling machines as have the axis of. the button chuckf'generallyperndi' l o the axi Q he r l b Su a machine is sufficiently accurate ato'p hand-sewing buttons" and In hi tons.

Other objects and advantages will be apparent as thedescript'ion p etens. The method comprising the present invention involves the steps ofsimultaneously'moving a pair of drills, positioned on" oppositefsides ofthe axis of a self-shank button blank and generally perpendicularthereto, toward said axis the drills being positioned along th axis soas to contact the rear surface of the head and thereby'groove the backofthe button blank, then continuing diction of one of the drills to andpartially through the shank Q r thebutton blank a d; r tracting andmaintaining the other "drill out'of for driving the drum contact withthe button blank, and finally retracting the drill which has drilledpartially through the shank and moving the other drill into and; theremainder of the way through the shank. As well as passing the otherdrill the remainder of the way through, this drill may be passed all theway; through the shank to clear the hole and eliminate anyoffset. Therate of passage through the shank for clearing and for eliminatingoffset may be greater than during drilling proper and thereby increaseproduction.

This invention is illustrated in the accompanying drawings which showembodiments thereof and in which,

Fig. 1 is a front elevation of a machine embodying the presentinvention;

Fig. 2 is a right end elevation of the machine shown in Fig. 1;

Fig. 3 is a section on the line 3 3 in Fig. 2;

Fig. 4 is a section substantially on the line 44 in Fig. 3;

Fig. 5 is a fragmentary section on a plane passing through the centralaxis of the drum and through the central axis of one of the drill shaftsshowing, in detail, one of the chuck and drill assemblies;

Fig. 6 is a detail elevation of one of the chuck and drill assemblies;Fig. 7 is a detail of the box clutch assembly and of the mounting forthe drum;

Fig. 8 is a detail section of a portion of the carn track for operating"the drills and of the adjusting meanstherefor;

'Fig." 9 is a detail of an alternative form of chuck jaw for the machinecomprised within this invention;

Figs. 10 to 15 constitute a timing schedule illustrating the sequence ofdrilling operations preferred in the practice of this invention;

'Fig. 16 is a fragmentary section through the central shaft and throughone of the drill chucks and shows a modified form of'drill chuckarrangernent in which an independent motor is usedto drive each drill.Also this figure illus-' trat-es a modified positioning of the axis ofthe drill whereby the drill both makes the hole and reams it to atapered'shap'e;

Fig. 17 is a sectionon the line |l-l'l in Fig. i t

Fig. 18 is a detail of a drill as shown in Fig. lfi d uring drillingoperation on a blank, showing the blank in section;

Fig. 19 is a fragmentary elevation of a machine equipped with a modifiedform of chuck and chuck-operating cam;

Fig. 20 is a right end view of the machine shown in Fig. 19 moreparticularly showing the chuck-operating cam; and

Fig. 21 is a section on the line 2|2| in Fig. 19.

In the machine shown, a frame base |8 is provided upon which is mounteda pair of frame plates I! which carry the operative part of themechanism. On the right hand end of the base IS, the drive mechanism I8is mounted which, through suitable driving connections, drives theoperative parts.

A shaft I9 is carried in openings in the frame plates IT and is held byset screws 25 against rotation in the plates, the set screws allowingrotative adjustment of the shaft. A pair of bushings 2| is carried bythe shaft l9 between the frame plates, to each of which is connected aring 22 by radially positioned webs 23, the rings being concentric withthe bushings. A drum 24 is secured to the rings 22 so as to rotatetherewith. This drum 24 comprises a cylindrical piece 25, to each end ofwhich one of the rings 22 may be attached, a second generallycylindrical piece 26 and a web 21 located at the mid-point ofcylindrical pieces 25, 25 and perpendicular thereto which web holds thepieces in concentric relationship.

During operation, the bushings 2|, rings 22, and cylindrical pieces 25,2B rotate as a unit on the shaft l9.

A cylindrical flange 28 is formed integrally with one of the rin s 22and its associated webs 23. At the end of the flange 28 opposite thering 22, the flange is adapted to have a rin gear 29 secured thereto, bymeans of which the drum 24 is rotated.

The drive mechanism l8, which as is previously stated is mounted on theright hand end of the frame base l6, includes a motor 30 which isconnected through a flexible coupling 3| to a gear reduction mechanism32, the driving gear 33 of which is in mesh with a gear 34 carried bythe shaft 35. The shaft 35 is carried by bushings in one of the frameplates I1 and has secured, as by a key, to its end opposite the gear 34,a pinion 36 which meshes with the ring gear 29. The gear 34 is freelyrotatable on the shaft 35 and has secured centrally thereof a box clutchmember 31. A second box clutch member 38 is slidably and non-rotatablycarried by the shaft 35 adjacent member 31, a yoke arm 39 engagingtherewith for effecting sliding movement thereof. A clutch shifting arm40 is pivoted to the frame for moving the yoke arm.

When the clutch is in engagement, the motor 38 will drive the drum 24through the gear reduction mechanism, the gear 34, shaft 35, and ringgear 29.

The generally cylindrical piece 26 is in fact formed with a plurality offiat faces, each parallel to the axis of the drum and equally spacedtherefrom. Each face of the drum is provided with an exteriorly openingradial socket which extends into an enlarged portion 4| of the web 2'1.A chuck bar 42 is positioned in each of the sockets, each chuck barcomprising a tubular portion 43 at its inner end and jaws 44 at itsouter end, which jaws are integral with the tubular portion. The innerportion of each of the jaws is cut thin, whereby the jaws will flexreadily. The end of each jaw may be either as shown in Fig. 5 or as inFig 9, in either of Which the drill operates at an angle with the chuckbar, and the chuck jaws hold the selfshank button blank with the axisthereof substantially perpendicularly to the axis of the drill.

In the form of the invention shown in Fig. 5, a depression is out in theend of the chuck bar for the reception of the head of the blank 45 withthe blank and chuck bar coaxial. In the form shown in Fig. 9, a notch45, lying in a plane perpendicular to the axis of the drum, is cut inthe chuck jaws. As described in our co-pending application, Serial No.309,860, filed December 18, 1939, such a chuck may have two or morejaws. In the adaptation of this chuck to the present machine, a drillingopening 4! extends through the chuck jaws and intersects the notch 46.When a self-shank button blank is positioned with the head against thejaw 48 and the shank in the notch 46, a drill passed through the opening41 will engage and drill through the shank of the blank. The enlargement4| in the web 21 is provided with a set screw to allow axial adjustmentof the chuck bar, whereby to drill precisely at the desired location.

The portion of the chuck jaws extending out of the socket is formed withan inclined shoulder 48. A collet .9 is positioned about the chuck jawsfor movement into engagement with shoulder 48 whereby to close thechuck. Each collet is carried on the outer end of a pair of rods 50,slidable into and out of the drum, and with the inner end of each pairof rods connected by a plate 5| carrying an antifriction cam follower 52in axial alignment with the associated chuck bar. Springs 53 arepositioned about the rods 50 between the cylindrical piece 25 and theplate 5| whereby normally to hold the collet assembly in positionclosing the chuck. In order to have the collet assembly as much out ofthe way as possible, each assembly, while maintained radial of the drum,is located at an angle of 45 to theaxis of the drum as best seen in Fig.3.

As shown in Fig. 4, a cam 54 is secured nonrotatably on the shaft H) bya set screw 55, the shaft l9 being held against rotation by set screw20. The cam 54 is positioned in the plane of cam followers 52 andextends forwardly sufiicient to open the blank holding chucks from aposition slightly below horizontal to a position slightly abovehorizontal. As the drum is driven clockwise, as seen in Fig. 4, blanksmay be inserted just above a horizontal position of the chucks and,after progressing over the top, down the back side and under the bottom,the chucks are opened in the front by the cam 54, whereupon the drilledbuttons drop out. The cam 54 is of a shape not to engage the camfollowers except at the front, in all other positions the collets beingfree to move to closed chuck position under action of springs 53.

For convenience of expression, the chucks heretofore described will bereferred to herein-. after and in the claims as button chucks todistinguish them from the drill chucks hereinafter described, though itshould be remembered that it is button blanks which are placed in thechucks, not, in fact, buttons.

On each of the heretofore described faces of the drum is positioned apair of drill supports and driving means, which carry drills formovement substantially parallel to the axis of the drum. While thedrills are shown in the drawings as parallel to the axis of the drum, wehave found that for some classes of work it is desirable that a; slightanglebe established between the drill andtthe axis; asiby. theinsertionof a wedge between: the-,drilli, support and thedrum, or asshown hereinafter. Any angle up to a. maximum of about five degrees (5)for; the purposes of this typeof machine isgenerally perpendicular, andsuchis'the meaning of: the-term generally, perpendicula-r as usedherein.

Referring-now more particularly-to Figs. Sand 6 a pair ofshaftesupporting brackets 56 is secured to. the drum adjacent eachbutton chuck. The brackets are each bolted to the drum and are providedwith alongitudinal flange 51- which. slidably engages in a groove in thesurface of the. drum, which groove is in alignment with the buttonchuck. Each bracket has a pair of arms 5-3, each of which is: providedwith a bushing. The bushings are: in alignment for the reception ofshaft 59'- wh-ioh is slidablyv and rotatably carri d thereby. (on theend of each shaft 55 toward the button chuck is positioned a chuck forholding a. drill. These chucks may be of any desired variety, such asthe standard chucks shown or, if desired; may be the well known Jacobschuck. A flanged pulley Ellis fixed nonrotatably and non-slid'ably toeach of the shafts 59,. A spring 6'! is positioned about each shaftbetween the pulley [ill and the bracket arm 56 adjacent the chuck, therebeing a thrust bearing 62: between the spring and the cooperating arm.The spring acts at all times to move the shaft 59. and the drill 63carried thereby away from the button chuck.

At the end of the shaft opposite the drill chuck is positioned a camfollower Ed in adjustable screw-threaded relation to the shaft. Incooperating relationship with the cam followers 64, a circular'cam track65 is provided on the inner face of each of the frame plates i'i, thecam tracks being best shown in Figs. 4 and 8. The cam tracks are made inshort sections 66, each section being secured to the frame plates H byone or more tie bolts 51 and held spaced therefrom by one or morespacing bolts 88. As any one of the shafts 59 is carried about the shaftl9 by the drum, the cam follower will be pressed by the cam track tomove the drill toward the button chuck and, upon arriving at thedischarge position at the front of the machine, the cam track allows thespring 53 to withdraw the drill.

The drill driving means is provided, in duplicate, to drive the drillson ODQOSltB sides of the machine, the details of one such driving meansbeing best shown in Fig. 4. The drill driving means includes a motor 69mounted on the base of the machine at the rear and provided with apulley 1D. A flat endless drive belt ll extends below the drum from thelower side of the pulley l and passes below a pulley 52 located at thefront of the machine and sufficiently low that the belt will clear thedrum. The belt next passes around a pulley I 3 in front of the machineand then follows back under the machine in driving engagement with thepulleys 66, about the pulley 4; at the upper front of the machine, backaround pulley I and to the position of the belt heretofore described atthe pulley it. The pulley 1.4. is mounted on arms Hi to swing aboutshaft ll as a pivot whereby the belt may be tightened as desired.

For convenience in feeding the machine and for positioning the drillgauge 18, the table 59 is mounted in front of the drum at substantiallythe level of the shaft I 9, being secured at its One ofthe primaryadvantages of the machine above described is the small number ofadjustmerits, needed on the machine to turn out accuratelygauged resultsand uniform product. Foradjusting the machine initially, the adjustmentpreferably made first is the position of the button chucks. One of thechuck bars is loosened and adjusted till, if the type chuck shown inFig. 5 is used, the drills will just pass the end of the bar or, if thetype shown in Fig. 9 is used, the drills will enter the drilling openingll, the set screw then being tightened. The gauge 18 may-then be placedin position engaging the end of the chuck bar which has been soadjusted, and the others adjusted to a position in which they engage thegauge when the drum is turned, bringing each chuck bar in successioninto position adjacent the The preferably next adjustment is of thedrilling means. The important factor in this adjustment is that thelength from the end of the cam follower to the end of the drill be ineach instance the same. If it were necessary to measure this each time adrill is replaced, operation of the machine would be greatly retarded.In this machine, then, the cam followers 64 are adjusted on theirsupporting shafts So that, in normal position, 1. e., in the positionassumed under action of the spring 6i when the cam s5 is not acting, theends of each set of cam followers are in the same position along theshaft I9. The cam followers are then locked in position and no furtheradjustment thereof need ever be made. For adjusting the drills, thedrill chucks are successively moved to position adjacent the table "l9,whereat the drill shafts are in normal spring pressed position, and thedrills are successively adjusted to a constant distance from the centerplane of the button chucks as determined by the gauge 18. Subsequently,when it is necessary to replace drills, for example, after sharpening,the operator does not need to leave his position in front of the machineto obtain perfect adjustment.

The final adjustment to place the machine in operation is of the camtracks 65. Any of a varietyof adjustments may be made on these tracks toperform various drilling sequences. Figs. 10 to 15 illustrate ourpreferred sequence of drilling operations. In Fig. 10, the button blankand drills are in their initial or normal position before drillingcommences. The cam tracks are adjusted so that both drills move inwardlyand groove the back of the button blank at 84 outside of the shank.Following grooving, as shown in Fig. 12, one of the drills moves in todrill half way through the shank, and the other drill is retracted outof the way to prevent breakage of the drill in case of chipping of thebutton blank. Then, as shown in l3 and 14, the drill which haspenetrated the shank is retracted and the other is brought up by the camtrack and gradually moved into the shank. This drill should go into theshank slightly more than half way in order to clear the opening throughthe shank, and may be moved entirely through to avoid any offset, asshown in Fig. 14. The last drill is then ends to the .frame plates H. Ahard!) is secured retracted from contact with the button, as shown inFig. 15. The positions shown in Figs. to occur sequentially from aposition just above the table to a position just below the table.Following withdrawal of the last drill, the chuck is opened and thfinished button drops out.

If desired, the grooving operation may be omitted by drilling a shadefarther from the face of the blank. In this event, the cam tracksegments are positioned so that drilling of the shank will occur allaround the drum. This will allow greater speed of the drum withoutincreasing the drilling speed since the entire active length of themachine is employed for shank drilling.

Having now described the structure and adjustment of the illustrativemachine, for a better understanding thereof, the operation will now bedescribed.

With the machine adjusted as above described, the three motors may beturned on. The motor 39 drives the drum 2 t through the flexiblecoupling 3I, speed reduction mechanism 32, gear 34, pinion 36, and ringgear 29, the motor rotating in a direction to raise the front side ofthe drum. The motors 69 drive the drills when positioned anywhere aroundthe drum except the front upper quarter and a discharge space extendinga short distance therebelow. The drills are driven by the belt IIengaging the pulleys 66, which, being seemed to the shafts 59, rotateboth the shafts 59 and the drills 63 carried thereby. As all of thedrill and button chuck assemblies work identically, the operation willbe followed for one. Starting at the level of the table '59, the cam 54presses against the cam follower 52 which, through the rods 50, holdsthe collet in inactive position. The operator places a self-shank buttonblank in the chuck while open. The cam follower then moves off of thecam 54, resulting in the springs 53 closing the chuck and holding theblank in position. The cam followers 64 then engage the cam tracks 65which press the drills into drilling engagement with the blank, thedrills moving in accordance with the setting of the cam tracks, asheretofore explained. When the button chuck arrives at a positionslightly below the table 19, the cam tracks allow the springs 6I towithdraw the drills, whereupon the cam 54 again engages cam follower 52,thereby causing the button chuck to open and allowing the button to fallout.

In the form of the invention shown in Figs. 16 to 18, the machine isconstructed in the same manner as in the form shown in Figs. 1 to 15,with the exception of the supports and operating means for the drills.On each face of the drum 26 are disposed two pairs of guides 90, onepair being arranged in each direction from the chuck 42, the guidesbeing parallel to the axis of the machine. The guides 90 are undercutand are complemental to a dovetail portion of a U-shaped bracket 6iwhich is slidable in the guides parallel to the axis. The two arms ofthe U-shaped bracket stand out from the drum, the arm 92 being adjacentthe chuck and the arm 93 remote therefrom. A slot 94 is provided in thebase of the bracket 9| parallel to the guides, and a spring guiding pin95 is secured in the bracket in the end of the slot distant from thechuck. A spring support 96 is secured in the drum 26 extending into theslot 94. Spring 91 is positioned upon the pin 95 and support 96 so as tonormally hold the bracket away from the chuck 42. A stop 98 isadjustably secured to the drum 26 by bolts 99, this stop beingpositioned in the line of movement of the bracket away from the chuck,adjustment varying the normal position of the bracket.

A cam follower supporting arm I60 is threadedly secured in bracket arm93, and may be locked in position by lock nut IIJI. The cam follower 64is adjustably secured to the arm I00 in the same manner as the follower64 is secured to shaft 59. The cam follower 64 cooperates with the drilloperating cam track in the same manner as heretofore described inconnection with Figs. 1 to 15,

In each bracket SI a motor IE2 is secured between the arms 92, 93 as bybolts I63. The shaft I04 of the motor is provided with a chuck I05 forholding a drill at its end adjacent the button chuck. A thrust bearingIBIS is provided to take the thrust upon the shaft of the motor duringdrilling.

While the motor shaft I94 may be positioned parallel to the shaft I9 ofthe machine and a cylindrical type of drill employed as in the formshown in Figs. 1 to 15, we have shown the motor positioned in Fig. 16 sothat the shaft I04 is coplanar with the shaft I9 and at an angle ofabout five degrees thereto.

When this form of drilling is employed, i. e., when the drill which isgenerally perpendicular to the axis of the button blank is, in fact, ata slight angle, a tapered reaming drill, such as drill IE1, ispreferably employed. With the drill placed at five degrees to the axisof button blank 83, a drill I6! is employed which drills a conical holewith an angle of ten degrees between opposite sides of the hole,

With the button chucks 42 and cam followers 64 adjusted as previouslydescribed, the drill operating cam track will then be adjusted in theform of device shown in Figs. 16 to 18, first to move both drills intoward the axis of the button to groove the back of the button adjacentthe shank. One drill will then be retracted and the other will be movedto drill just slightly more than half way through. That drill will thenbe retracted and the drill first retracted will then be moved justslightly more than half way through the shank.

It is obvious that in initially grooving the back of the button adjacentthe shank the drill I01 will cut a relatively narrow groove, but whenthe drill is moved on into the shank, the groove is widened by reamingwithout being cut deeper.

It should be understood in connection with both the form shown in Figs.1 to 15 and with that in Figs. 16 to 18 the two drills maysimultaneously drill partially through the shank, if desired, prior toalternate drilling.

In the form of the device shown in Figs. 19 to 21, a modified form ofbutton chuck and operating cam therefor is shown. In this form, the camis omitted. 1

A pair of chuck bars I08 is slidably "carried,

one by each of the brackets 56 of each pair of brackets. A spring I99connects each pair of chuck bars I08 to draw them together; Each chuckbar I98 is provided with a chuck jaw IIO' attached to its inner endwhich cooperates with the chuck jaw of the associated chuck bar in theholding of a button. In order to center the chuck,

a pin III is carried by the drum 26 between the chuck jaws.

The outer end of each bar I 08 isprovided with a finger H2 to hookoutside of a cam track I I3 which extends in the forward part of themachine from slightly below the center to a. position just prior tocommencement of drilling position. Th cam tracks H3 are so shaped as toretract the bars I08 and open the chucks. When the bars "18 pass out ofrange of tracks H3, the springs I09 close the chucks which are centeredby pins l l I. The operation of this form of machine otherwise is thesame as described in connection with Figs. 1 to 15. It is obvious thatone of the chuck jaws may be mounted stationarily on the drum, and thatthe other may be movable as shown by the spring and cam.

Having now described our invention, we claim: 1. A self-shank buttondrilling machine comprising a button chuck having a plurality of jawsarranged about an axis, a continuously rotating body member, rotating onan axis fixed in position, saidchuck being fixedly connected to saidrotating body member, a collet slidably mounted on said chuck forsliding movement longitudinally thereof to cooperate with said chuckjaws in causing opening and closing movement thereof, a drill shaftcarried by said body member with the shaft position generallyperpendicular to the axis of the button chuck, a carrier for said drillshaft rigidly secured to said body member and holding the shaft in fixedalignment with reference to the axi of the button chuck, said drillshaft being adapted for rotation and for translation toward and from thebutton chuck, said drill shaft and button chuck being carried by saidbody member for simultaneous rotation about the axis of rotation of thebody member with the axis of the drill shaft approximately perpendicularto the axis of the button'chuck, the rigid mounting of the button chuckand the drill shaft eliminating substantially all relative movement ofthese parts other than longitudinal movement of the drill shafttransversely of the button chuck, a drill chuck, for carrying a drill,mounted on the end of the shaft proximal to the button chuck and meansto move said drill shaft and the drill chuck toward and from said buttonchuck, timed with respect to the movement of the collet along the axisof the button chuck to move the shaft toward the button chuck subsequentto closing movement of said collet and to move the prising a supporthaving a fixed axis about which it may rotate, said support carrying abutton chuck fixedly connected thereto for rotation therewith about saidaxis, a drill carried by said support, means mounting said drill withits axis approximately perpendicular to the axis of a button shank heldin said chuck, said chuck and said mounting mean being so fixed inrelative position that when said drill is rotated and longitudinallyreciprocated transversely to the axis of the button shank it will outalong the under face of said button, prior to and while drilling theshank, forming on said face of the button body a needle guide groove.

3. A self-shank button drilling machine, comprising a support, a unitarybody member, means mounting said body member for rotation on saidsupport, said body member having an axially extending supportingsurface, a button chuck having a plurality of jaws arranged about anaxis, means immovably mounting said jaws on said supporting surface withthe axis thereof extending at right angles thereto and radially of theaxis of said rotating body member, said means including shanks, each ofwhich is rigidly connected to said surface at one end and supports a jawat the other or free end, said shanks being sufficiently resilient toallow for opening and closing movement of said jaws, a collet mounted insaid body member for movement along the axis of said jaws to effectmovement of said chuck jaws together and apart, bearings immovablycarried by said supporting surface, a drill shaft slidably and rotatablycarried by said bearings, said bearings being so constructed andarranged that said shaft is carried in a position substantiallyperpendicular to the axis of said button chuck and parallel to the axisof rotation of said body member, a drill chuck mounted on the end of theshaft proximal to said button chuck and aligned so that a drill carriedby said drill chuck will pass through the shank of a button blank heldby said button chuck, means for rotating said drill shaft, and mechanismcoordinated with the rotation of said body memher for sliding said drilland moving said collet in proper timed sequence.

JOHN WEBER, JR. CHARLES F. WEBER. LOUIS H. WEBER. WALTER F. WEBER. FRANKH. WEBER. EDWARD W. WEBER. LEONARD G. WEBER. CARL A. GOETZMAN.

